1. ASTM. (1994). “Standard test method for flexural strength of concrete (using simple beam with third-point loading).” C 78 West Conshohocken Pa.
2. ASTM. (2000). “Standard test method for liquid limit plastic limit and plasticity index of soils.” D 4318 West Conshohocken Pa.
3. ASTM. (2002). “Standard test methods for laboratory compaction characteristics of soil using modified effort.” D 1557 West Conshohocken Pa.
4. ASTM. (2004). “Standard test method for compressive properties of rigid cellular plastics.” D 1621-04a West Conshohocken Pa.
5. ASTM. (2005a). “Standard test methods for compressive strength of cylindrical concrete specimens.” C 39 West Conshohocken Pa.